TEXTURAL AND MICROANALYSIS OF IGNEOUS ROCKS: TOOLS ...

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169 TABLE 3.4 Continued Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) XLC2 C A 67 1.8 0.3 0.1 0.09 0.05 0.03 0.01 205.9 36 2.71 6.89 5.65 1.65 9.1 XLC3 C A 71 1.7 0.26 0.1 0.09 0.05 0.03 0.01 220.6 37.5 2.58 6.98 3.95 1.05 10.2 XLC4 C A 67 1.8 0.3 0.1 0.09 0.05 0.03 0.01 186.4 32 2.7 6.64 4.47 6.23 17.4 XLC5 C A 66 1.82 0.3 0.1 0.09 0.05 0.03 0.01 185.9 39.7 2.73 7.79 3.48 2.47 14.7 XLD1 C A 68 1.76 0.29 0.1 0.09 0.05 0.03 0.01 226.4 48.4 3.3 7.41 5.73 1.68 12.6 XLD1 C A 68 1.78 0.29 0.1 0.09 0.05 0.03 0.01 219.4 42.4 2.72 7.47 5.1 1.98 9.1 XLD2 C A 70 1.72 0.27 0.1 0.09 0.05 0.03 0.01 232 52.4 3.39 8.39 5.71 1.75 14.8 Site 1203 Unit 31 A C B 86 1.32 0.15 0.13 0.11 0.07 0.05 0.01 254.1 34.9 1.95 4.96 4 1.42 9.5 A C B 85 1.34 0.16 0.13 0.11 0.07 0.05 0.01 246.5 34.3 1.86 4.54 3.32 1.74 11.3 A C B 82 1.42 0.18 0.13 0.11 0.07 0.05 0.01 225.9 31.6 1.81 4.08 3.1 1.13 11 A R B 86 1.32 0.15 0.13 0.11 0.07 0.05 0.01 248.7 45.3 1.79 4.82 3.88 0.92 14.4 continued...
170 TABLE 3.4 Continued Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) C C B 81 1.44 0.19 0.13 0.11 0.07 0.05 0.01 236 34.4 2.24 5.15 2.82 1.16 9.1 C C B 82 1.41 0.18 0.13 0.11 0.07 0.05 0.01 236.6 33.2 1.94 3.96 2.84 1.2 10.5 C I B 81 1.44 0.19 0.13 0.11 0.07 0.05 0.01 224 28.6 1.7 3.97 2.77 0.64 8.8 C I B 80 1.45 0.19 0.13 0.11 0.07 0.05 0.01 219.5 28.7 1.77 3.69 3.24 0.86 8 C I B 87 1.29 0.15 0.12 0.11 0.07 0.05 0.01 267.8 37.9 1.94 4.12 3.66 1.27 11.2 C I B 84 1.37 0.17 0.13 0.11 0.07 0.05 0.01 260.8 38 2.18 5.03 3.78 1.05 12.9 D C B 82 1.41 0.18 0.13 0.11 0.07 0.05 0.01 229.3 31 1.15 3.44 1.8 0.6 8.4 D C B 81 1.43 0.18 0.13 0.11 0.07 0.05 0.01 226 29.4 1.52 4.2 2.52 0.5 7.7 D C B 86 1.32 0.15 0.13 0.11 0.07 0.05 0.01 250.6 36 1.91 5.16 2.73 1.46 10 D I B 84 1.37 0.17 0.13 0.11 0.07 0.05 0.01 238.8 35.1 1.86 4.8 2.78 1.21 10.2 D I B 83 1.39 0.17 0.13 0.11 0.07 0.05 0.01 233.8 34.2 1.68 4.25 3.32 0.89 8.6 E I B 82 1.4 0.17 0.13 0.11 0.07 0.05 0.01 241.1 35.5 1.84 4.22 3.66 0.96 12.6 E I B 84 1.37 0.17 0.13 0.11 0.07 0.05 0.01 244.6 49.8 2.01 4.37 2.9 1.76 9.2 continued...
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TEXTURAL AND MICROANALYSIS OF IGNEO
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TEXTURAL AND MICROANALYSIS OF IGNEO
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DEDICATION This work is dedicated t
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CHAPTER 2: MAGMA EVOLUTION REVEALED
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3.6.3.1 Crystal Population Origins
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FIGURES 1.1 Magma Chambers . . . .
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TABLES 2.1 MAJOR AND TRACE ELEMENT
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thus been debate within the volcano
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Cambrian schist) including a crysta
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explosive eruption vs. mild effusiv
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tiation (e.g., [84, 98]; Fig. 1.3).
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defined as having crystallinities b
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12 Figure 1.4: Large Igneous Provin
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distribution of crystal sizes (e.g.
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investigating magmatic evolution us
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length dispersive spectroscopy(WDS)
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microdrilling, a pre-cleaned square
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1.7.2 Detroit Seamount, Part of the
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lations. Reprocessing of intrusive
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nucleated homogenously and grew thr
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With accurate partition coefficient
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uniform composition of large volume
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Figure 2.2. Hand sample and thin se
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2.3.1 A Cogenetic Relationship Betw
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Figure 2.4. Stratigraphic section o
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Figure 2.5. Backscatter electron im
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studies of Kwaimbaita basalt by San
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42 Crystal Zone An (mol%) TABLE 2.1
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44 Crystal Zone An (mol%) 63R2 phen
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along the xenolith margins (e.g., F
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are more abundant in phenocrysts fr
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54 Crystal Zone 5 ML-X1 xenolith TA
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56 TABLE 2.2 Continued Crystal Zone
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Figure 2.7. Measured major and trac
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2.5.3.2 Trace Elements It is diffic
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Figure 2.9. Trace element ratio plo
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2.5.4 Resorption Features in Site 1
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should, however, be noted that in t
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2.6.1.2 An-rich OJP Plagioclase: In
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equivocally the roles of H2O, press
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ent magma requires significant clin
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tion driven plumes, or stirring by
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Yamashita, [123], and thus did not
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erally extensive crystal-mush netwo
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asalt at Site 1185 of ODP Leg 192 [
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CHAPTER 3 SHALLOW MAGMA EVOLUTION D
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magma compositions [23, 39, 98]. A
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Figure 3.2. Stratigraphy of basalts
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[118]. No volcaniclastic rocks were
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magmatic crystallization. Using the
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Figure 3.3. A cross polarized light
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3.4.5 Major and Trace Element Data
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3.4.6.1 Partition coefficients for
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3.5.1.2 Site 884 CSDs I measured pl
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Figure 3.5. Plagioclase CSDs of ODP
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106 TABLE 3.2 CSD RESULTS Sample OD
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ln (n) [mm -4 ] ln (n) [mm -4 ] 10
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ulation A crystals are unzoned (An6
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Figure 3.8. a) The majority of Site
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3.5.4.3 Site 1203 Unit 31 and Site
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3.5.5 Trace Elements 3.5.5.1 Measur
Page 131 and 132: Unit 31 > Site 884 Unit 8 (Table 3.
Page 133 and 134: 3.6 Discussion 3.6.1 Evidence of Cr
Page 135 and 136: 3.6.1.1 Site 1203 Alkalic Basalts a
Page 137 and 138: etween the different crystal popula
Page 139 and 140: Unit 14 and 31 magmas accumulated o
Page 141 and 142: sition is similar to parent magmas
Page 143 and 144: Sr - low La/Ce population A parent
Page 145 and 146: The Unit 31 plagioclase CSD is kink
Page 147 and 148: was dominated by late stage clinopy
Page 149 and 150: pressure, and growth of An-rich pla
Page 151 and 152: 138 TABLE 3.3 PLAGIOCLASE PHENOCRYS
Page 153 and 154: 140 TABLE 3.3 Continued Sample Zone
Page 181: 168 TABLE 3.4 Continued Sample Zone
Page 187 and 188: KP has been done via drilling at 11
Page 189 and 190: and over time crustal wall-rocks be
Page 191 and 192: flow [33]. I selected a single samp
Page 193 and 194: 4.3.4 Major and Trace Element Data
Page 195 and 196: B) C) parafilm splash guard A) tape
Page 197 and 198: of these elements are the better co
Page 199 and 200: 5 mm 5 mm Figure 4.4. Cross polariz
Page 201 and 202: 4.4.2 Electron Probe Microanalysis
Page 203 and 204: An (mol %) An (mol %) An (mol %) An
Page 205 and 206: study exhibit their highest An at t
Page 207 and 208: 4.4.3 LA-ICP-MS - Trace Elements An
Page 209 and 210: 87 86 Sr/ SrI = 0.705722(8) Ba/Sr =
Page 211 and 212: and Rb (Fig. 4.11d,e). 4.4.3.3 Yttr
Page 213 and 214: Sr (ppm) Y (ppm) La (ppm) Ce (ppm)
Page 215 and 216: Unit 4 plagioclase rims plagioclase
Page 217 and 218: 204 TABLE 4.4 UNIT 4 PLAGIOCLASE PA
Page 219 and 220: 4.5 Discussion 4.5.0.1 Origin of Ma
Page 221 and 222: 4.5.0.2 Insights from Trace Element
Page 223 and 224: that other factors influenced the a
Page 225 and 226: C A/B / D A/B C A/B / D A/B Unit 4
Page 227 and 228: Magma chambers tend to form at hori
Page 229 and 230: whole-rock basalt data. Cumulate xe
Page 231 and 232: over short time spans but may be ea
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lowing initial Elan Bank magma empl
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BIBLIOGRAPHY 1. C. Allegre, A. Prov
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22. B. Charlier, J. Davidson, O. Ba
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46. J. Fitton and M. Godard, Origin
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68. M. Higgins, Measurement of crys
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89. J. Longhi, D. Walker and J. Hay
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100 of Geophysical Monograph, pages
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129. J. Tarduno, W. Sliter, L. Kroe
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